Cushion for an electric toothbrush



FIG. 1 is a perspective view;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a front elevation;

FIG. 5 is a side elevation;

FIG. 6 is a rear elevation.

The partial broken line showing of an electric toothbrush is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a cushion for an electric toothbrush, as shown. 